package servlets.module;

import dbProcs.Getter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.owasp.encoder.Encode;
import utils.CheatSheetStatus;
import utils.ShepherdLogManager;
import utils.Validate;

/**
 * Control class responsible for returning a cheat sheet for a module <br>
 * <br>
 * This file is part of the Security Shepherd Project.
 *
 * <p>The Security Shepherd project is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.<br>
 *
 * <p>The Security Shepherd project is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details.<br>
 *
 * <p>You should have received a copy of the GNU General Public License along with the Security
 * Shepherd project. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Mark Denihan
 */
public class GetCheat extends HttpServlet {

  private static final long serialVersionUID = 1L;
  private static final Logger log = LogManager.getLogger(GetCheat.class);

  /**
   * This method will reject requests if cheat sheet availability is marked as unavailable by
   * administration.
   *
   * @param moduleId
   * @param csrfToken
   */
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // Setting IpAddress To Log and taking header for original IP if forwarded from proxy
    ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
    log.debug("*** servlets.Admin.GetCheat ***");
    response.setContentType("text/html");
    String[] result = null;
    PrintWriter out = response.getWriter();
    out.print(getServletInfo());

    HttpSession ses = request.getSession(true);
    if (Validate.validateSession(ses)) {
      ShepherdLogManager.setRequestIp(
          request.getRemoteAddr(),
          request.getHeader("X-Forwarded-For"),
          ses.getAttribute("userName").toString());
      log.debug("Current User: " + ses.getAttribute("userName").toString());
      Cookie tokenCookie = Validate.getToken(request.getCookies());
      Object tokenParmeter = request.getParameter("csrfToken");
      if (Validate.validateTokens(tokenCookie, tokenParmeter)) {
        if (CheatSheetStatus.showCheat(ses.getAttribute("userRole").toString())) {
          String ApplicationRoot = getServletContext().getRealPath("");
          String moduleId = request.getParameter("moduleId");
          Locale locale = new Locale(Validate.validateLanguage(request.getSession()));
          log.debug(
              ses.getAttribute("userName") + " submitted the following moduleId: " + moduleId);
          if (moduleId != null) {
            result = Getter.getModuleSolution(ApplicationRoot, moduleId, locale);
            if (result != null) {
              out.write(
                  "<div id='theActualCheat' class='cheatBox'>"
                      + "<big style='color:#A878EF;'>"
                      + Encode.forHtml(result[0])
                      + " Cheat</big>"
                      + "<p>"
                      + result[1]
                      + "</div></p><br>");
            }
          }
        }
      } else {
        log.error("CSRF Attack Detected: Made Against" + ses.getAttribute("userName"));
      }
    } else {
      out.write("<img src='css/images/loggedOutSheep.jpg'/>");
    }
    if (result == null) {
      out.write("An error Occurred...");
    }
    log.debug("*** END servlets.Admin.GetCheat ***");
  }
}
